Process for vat color dyeing



Patented Mar. 18, 1 930 UNITED STATES FRANK L. REMLEIN, OF NEW YORK, N. Y.,

PATENT OFFICE ASSIGNOR TO E. I. DU POINT DE NEMOURS & COMPANY, OF WILMINGTON, DELAWARE, A. CORPORATION OF DELAWARE PROCESS FOR VAT COLOR DYEING No Drawing.

, reduced dyestufl and then develop in the jig,

or to dye the piece goods in the padder. and then pass the goods through a second reducing solution containing caustic soda and by drosulfite with or without the addition of color.

An object of my invention is a process of vat color printing or dyeing in ,a single step. A further object of my invention is the development of the color by evaporation of the Water remaining in the goods after paddin I have found that after the dyeing is e fected in the usual way by padding the cloth in a solution of reduced dyestuif, the color may then be developed by using the steam produced by the evaporation of the water remaining in the goods after they have passed the pad rolls. The development may be effected by running the cloth over steam heated cans. It will be understood of course that other means of heating may be employed for this purpose. By the use of this method I have found that extremely rapid production is possible and the dyeings produced are of the very best possible fastness obtainable with the particular dyestufi' used.

This process may be used for dyeing with vat colors in heavy as well as light shades.

By way of description of the rocess comprising my invention, the followmg illustrative example of dyeing on medium and light shades on light weight goods is given, but it will be understood that other embodiments exist and may be practiced without departing from the spirit of my invention.

The goods to be dyed are passed into apadding solution comprising:

For 160 gallows 10 lbs. Ponsol blue GD double paste (color index Number 1113).

8 lbs. Du Pont hydrosulfite cone.

8 lbs. caustic soda.

Application filed June 26, 1928. Serial No. 288,535.

8 lbs. animal glue.

1 lb. anthraquinone.

Reduce 10 min. at 130 F.

The goods are then passed through squeeze rolls and developed with steam by running the wet goods directly on hot cans before the color is oxidized to its insoluble state.

As many apparently widely different embodiments of this invention may be made without departing from the spirit thereof, it is to be understood that I do not intend to limit myself to the specific embodiments thereof except as indicated in the appendedclaims.

I claim:"

1. In the process of vat color dyeing, the steps which comprise padding the color in a solution of reduced dyestufl and developing the color with steam produced by evaporation of the water remaining in the goods after padding.

2. In the process of vat color dyeing, the steps which comprise paddin the color in a solution of reduced dyestu ing the color by running the wet goods directly on hot cans before the color is oxidized to its insoluble state.

In testimony whereof, I afiix my signature.

FRANK L. REMLEIN.

and develop- 

